Meat grinder



Dec. l, 1953 P. GULDENRING 2,661,040

MEAT GRINDER Filed oct. 19, 1949 A 7' To/QNE Ys Patented Decl l', 1953 UNITED ratsam OFFICE 2,661,0404 MEA! GRINQEB I laull Gldenring, Remscheid; Germany A vvlioation Qotohen t9, 194i?, orialltlof lltil'l 9 Claims, (01.'145-1g1g) l This. invention relates to Certain new. ann. ilse.- fulwi'rhnioveinents in meat grinders.. aliiltl it. has for its oloieets anions others in. addition te. those usually sought this olass ot der uioes. to.. ororlde an itnoroteol ineens for esoeoial: lyl nineteen-loot. composed of.y a wenn lor fofoinrs tfhs'nieat'finto the htinloing'ontterohaniher oi the mbhio'anola second for passi. a the At fouthe hopper to the. forse-feed soirewin. the. ou'roent'tsoo Inaohines of this oonstruotion the ioroeieeii soreW and the 'eonveyos seroit aio ai.-A ranfeetl elther in an axial line or Parallel. to. oooh oth as. Compared with the siinnle. talee.I niaohines. with only one wenn sushi maohinos offer thodisau'tantage of an ouerall length, with the added length of the conyeyor screw or of an` oyerailtig'rt or wloltuL with the adoos diameter of the oQn/'eyor screw. Another disadvantage isl the unsatlsfaotory eonveyanoe or the meat: feront the conveyor. screw toy the foreffleed worm.

' The s truotural embodiment of the. hresent, vention eliininates this drawbaols mainly due to. tige tact that the two Worms are assembled one. inside the, other in thatv the f orce-ofeedl Worm is.y prefeltbly housed insidel the screw conVeyQWth peripheral slots nrovloledv in the inner toolset Reet/Kent in eat conveyed by the force-:feedv WmlnA fioin moving baek- 'The two worms. hun the saine direction, but are designed with an opposite: lia-noty whereby the. nishts ofi the so enconveror have. a. oonoloaiathf'elr ooarser oitoh tlothieati of the foree=ioe l In., oxolelf to, attive at. a uniform ieeoins: oi the force-ieee.

. luth a View to eliminating a de i naolsinsand heating oi the nieat,.'the!sotettoon Votos oieroialolv driven los a vsneeol neon ne goal: through a oui-ll leoni the foroe-fee h`, i i

s c said sect1on of tige rnalnne voy-ol: tapeliine outwardly at the end faeins the filling chamber is another advantageous feature. "the oiieseht intention provides a Possibilityl of easilx'olr nine the inaehine in that the end. wall nine tout holding the outteis and Iettoiated dises. doos; not ohh7 protest the seroit lo ys oletaohahle, so that alter smantle tirefend wall, bfoth Worms can loe senioud'ioy'nullihe them out altoe.ethenU w Whnethe, struotnral embodiment of theI lou-oo; tion erein fore disolosed is what at the pres-A ent red preferable, it will be evi;

is, stellt-` that the S. tions, and nood.

onveyor. cleanly illustrated in the ao-v 30 company t ug, which, with numerals-forroleiehoe tnahseol thereon, form a part of this nJ and inwhniellA o gitllQQtt-l Section 0f 1the top part olathe tannuer-v Fie shouts a inooliheol oonstruotion of this oefening t., the drawings l designates the er and? a cylf rioal member with its longa lying. in transverse diieetion to the these'tuo sarto ,f onnins the loody'oi the riool ennslen To one end'ofthoeylin-. dr1 al part 2 is'tted a detachable erover 3 with tuloulai; oonheetion nleoe t aeoommodating oerforated discs 5 and Cutters 6, whereby. cap' nut 'I in. thteaoleu, engagement with the 'oonneoft'ion h a' Semoir oy of thlrustfol @tolto has'heen, estenoleol heyofndfthe, filling; hole 9 of the body with whichv portion it forms a totally enclosed cylinder I0, the outward enclof Whioh "iie'enl of ori'inorioal parti' t. oooositle a) has been drawn inwardly to serve as bearing II for supporting the driveof the machine.

Inside the cylindrical housing 2 of the machine body two worms I2, I3 have been arranged one inside the other. The inner solid worm I3 is totally encased by the outer tubular worm I2 and has been designed for forcing the meat in between cutters 6 of the machine. In order to prevent the meat on its way towards the cutters from moving back along the inner jacket I4 of the outer tubular worm I2, which encloses worm I3, spiral grooves I5 have been provided in the periphery of the inner jacket, which grooves eX- tend far into the free space formed by the tubular connection piece 4 accommodating force-feed worm I3. The inner jacket I4 tapers outwardly at its rear end I4', forming together with cylindrical section I and the last turn I6 of outer worm I2 a filling chamber I8 for passing the material to force-feed worm I3. The outer worm I2 serves for passing the meat entering through filling hole 9 to force-feed worm I3. The screw conveyor has a coarser pitch than the threads Il of the force-feed worm and an opposite hand Behind the last thread I6 the tubular wall of the screw conveyor I2 has been cut away in order to secure a free passage of the meat from chamber I3 to the force-feed worm I3.

The drive of the screw conveyor I2 is through a live flanged bushing I9 carried in bearing II by the aid of a cylindrical liner 20 and a coupling bolt 2| located inside the iiange, which coupling bolt is fastened to the screw conveyor. To the outward end of anged bushing I9 is mounted a drive gear 22 meshing a pinion 23 of a countershaft 24. The rear end of the force-feed screw shaped into a journal 29 is carried in flanged bushing I9 by means of an intermediate bushing 25. The outer end of worm shaft 29 is provided with flats 26 engaging a correspondingly shaped recess in a coupling flange 21 of drive shaft 28.

A variation in the design of the device, as shown in Fig. 2, comprises a housing with two worms I3 and I2 assembled one inside the other, whereby the inner worm I3 forces the meat against perforated discs and cutters 6, whereas the outer worm I2 serves for passing the material entering from the hopper I or through the opening 9 of the housing 2 to worm I3. According to this design the force-feed screw I3 revolves 1nside a cylindrical jacket 30 fitted inside the housing 2 of the body, which jacket serves for guiding the meat or other substance pushed forward by said worm. A screw conveyor I2 revolving around said jacket is of the sectional flight type similar in shape to the so-called ribbon conveyor. The cylindrical guide jacket 30 extends from the removable cover 3 of the machine body 2 to somewhat beyond the rear edge of the filling hole 9, so that the rear portion of the forcefeed worm inside the cylindrical rear section I0 of the housing 2 is non-jacketed, thus offering free access to the material fed by worm I2. The inside periphery of the jacket 30 is provided with spiral grooves I5 and its rearward end tapered outwardly, as shown at 30'. The jacket is rigidly mounted to cover 3, with which it preferably forms one integral part.

The following is an outline of how the machine works:

The meat filled into the hopper I enters through inlet 9 and passes to the screw conveyor I2, which conveys it into chamber I8 from where it reaches the force-feed worm I3. Both worms rotate in a coordinate sense, i. e, in the Same direction. Worm I3 forces the meat in between the perforated discs 5 and cutters 6, where it is minced. Due to the larger threads or flights I6 and their coarser pitch the Screw conveyor can handle considerably more material than the force-feed worm, so that the screw conveyor need only be revolved at a very low speed for feeding the volume of meat required by the force-feed screw. A constructional feature of the machine is its great ease of cleaning inasmuch as after having removed the detachable cover 3, both worms I2, I3 can be pulled out of the housing 2.

From the foregoing it will be seen that I have devised a novel, eflicient, and reliable form of meat grinder or mincer and that I do not intend to restrict myself to the particular construction hereinbefore set forth, but reserve the right to make such changes, variations, and modifications as come properly within the scope of the protection prayed. In particular, I do not wish to restrict the device to the grinding or mincing of meat but extend its usefulness to the satisfactory handling of other materials as well.

What I claim as new is:

l. A meat grinder, comprising, in combination with a casing, a hopper on top of said casing, and means connected to one side of said casing and constituting a cutter chamber communicating with the interior of said casing, a worm located within the interior of said casing and having threads formed to convey meat and the like from a space adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, and another Worm located within the first-mentioned worm and extending from said section to said cutter chamber and having threads fomied to convey the meat from said section to said cutter chamber.

2. A meat grinder, comprising, in combination with a casing, a hopper on top of said casing, and means connected to one side of said casing and constituting a cutter chamber communicating with the interior of said casing, a screw conveyor located within the interior of said casing and having threads formed to convey meat and the like from a space adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, and a forcefeed worm located within said screw conveyor and extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral grooves formed in the interior thereof and cooperating` with the threads of the worin.

3. A meat grinder, comprising, in combination with a casing, a hopper on top of said casing, and

means connected to one side of said casing and constituting a cutter chamber communicating with the interior of said casing, a screw conveyor located within the interior of said casing and having threads formed to convey meat and the like from ya space adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, a force-feed worm located within said screw conveyor and extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral grooves formed in the interior thereof and cooperating with the threads of the worm, the threads of the screw conveyor and the force-feed worm being inclined in opposite directions, the threads of the screw conveyor being larger and having a greater pitch than the threads or the iorcedeedl wenn and means' connected with. the screw conveyor and, the forcefeed worm'f'or rotating them in the same direction and for rotating the screw conveyor at substantiallyv lesser speed thanv the torce-feed. worm.

` 4. AA meat grinder, comprising, in combination witha'casing, a hopper on top or said casing, and means. connected` toone side of said casing and constituting a, cutter chamber communicating with the interior of Vsaid asing, a screw conveyor located within the interiori of said casing.. and having threadsy formed toV convey meat, andthe like, from a space adjacentl said hopper to asection locatuedwithin the interior of said casing; opp'osite said cutter-chamber, a force-feed worm l'ocated within said screw conveyor and extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral grooves formed in the interior thereof and cooperating with the threads of the worm, the threads of the screw conveyor and the force-feed worm being inclined in opposite directions, the threads of the screw conveyor being larger and having a greater pitch than the threads of the force-feed worm, a flanged bushing carried by said casing, a coupling bolt operatively connecting said screw conveyor with said anged bushing, a shaft journal carried by said bushing and operatively connected with said worm, a drive shaft, means operatively connecting said shaft journal with said drive shaft, and a drive connected with said bushing.

5. A meat grinder, comprising, in combination with a casing, a hopper on top of said casing, and means connected to one side of said casing and constituting a cutter chamber communicating with the interior of said casing, a, screw conveyor located within the interior of said casing and having threads formed to convey meat and the like from a space adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, a force-feed worm located within said screw conveyor and extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral grooves formed in the interior thereof and cooperating with the threads of the worm, the threads of the Screw conveyor and the force-feed worm being inclined in opposite directions, the threads of the screw conveyor being larger and having a greater pitch than the threads of the force-feed Worm, the rear end of said screw conveyor being located in an enclosed portion of said casing and terminating at a distance from said casing to form said section within the casing.

6. A meat grinder, comprising, in combination with a casing, a hopper on top of said casing, and means connected to one side of said casing and constituting a cutter chamber communicating with the interior of said casing, a screw conveyor located within the interior of said casing and having threads formed to convey meat and the like from a space adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, a force-feed worm located within said screw conveyor and extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral grooves formed in the interior thereof and cooperating with the threads of the worm, the threads of the screw conveyor and thei forcereed worm, being inclined in opposite. directions the threads cfl tbeiscr'ew conveyor being langer#r and having, a greater pitchv thanv the threads, ot the force-feed. wornn said screw; con-A veyor cornjgnrising` inner jacket, havingv ai taperedc rear end. located at a. distance from said casing, to form saidL section within the-casing.

'7., Armeatrgrinder, comprising, in combination, a casing, a, hoppery on topA of said casing. 2L member d'etachabl'y connected tol one sidel ci said cas.- ing. and constituting a out-ter chamber commu,- nicating with the interior of' said` cadilli,V a screw conveyor located within the interior oi" said casing and having threads formed to convey meat and the like from a space' adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, said cutter chamber having a width which is substantially equal to the diameter of said screw conveyor, a force-feed worm located within said screw conveyor and extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral grooves formed in the interior thereof and cooperating with the threads of the worm, the threads of the screw conveyor and the force-feed worm being inclined in opposite directions, the threads of the screw conveyor being larger and having a greater pitch than the threads of the force-feed worm, said screw conveyor comprising an inner jacket having a tapered rear end located at a distance from said casing to form said section within the casing.

8. A meat grinder, comprising, in combination with a casing, a hopper on top of said casing, and means connected to one side of said casing and -constituting a cutter chamber communicating with the interior of said casing, a force-feed worm located within said casing, a stationary jacket enclosing said force-feed worm, a ribbon-shaped screw conveyor located around said jacket and having threads formed to convey meat and the like from a space adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, said forcefeed worm extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral grooves formed in the interior thereof and cooperating with the threads of the worm, the threads of the screw conveyor and the force-feed worm being inclined in opposite directions, the threads of the screw conveyor being larger and having a greater pitch than the threads of the force-feed worm, said screw conveyor comprising an inner jacket having a tapered rear end located at a distance from said casing to form said section within the casing.

9. A meat grinder, comprising, in combination, a casing, a hopper on top of said casing, a member detachably connected to one side of said casing and constituting a cutter chamber communicating with the interior of sad casing, a forcefeed worm located within said casing, a stationary jacket enclosing said :force-feed worm and firmly connected with said detachable member, a ribbon-shaped screw conveyor located around said jacket and having threads formed to con- Vey meat and the like from a space adjacent said hopper to a section located within the interior of said casing opposite said cutter chamber, said force-feed worm extending from said section to said cutter chamber and having threads formed to convey the meat from said section to said cutter chamber, said screw conveyor having spiral` having a greater pitch than the threads of thev force-feed Worm, said screw conveyor comprising an inner jacket having a tapered rear end located at a distance from said casing to form said section Within the casing.

PAUL GLDENRING.

References Cited in the flleof this patent UNITED STATES PATENTS Number r 612,181 0 1,290,734 1,825,261 2,126,029

10 Number Name Date Spurrier Oct. 11, 1898 Goodhue Jan. 7, 1919 Burns et a1 Sept. 29, 1931 Parker Aug. 9, 1938 FOREIGN PATENTS Country Date Denmark Apr. 1899 Germany Oct. 21, 1909 Germany Feb. 14, 1936 Germany June 7, 1939 

